@InProceedings {saj.ccs94,
    author = {P. Samarati and P. Ammann and S. Jajodia},
    booktitle = {Proc. of the 2nd ACM Conference on Computer and Communications Security},
    title = {Propagation of Authorizations in Distributed Databases},
    address = {Fairfax, VA},
    pages = {136-147},
    month = {November},
    year = {1994}
}